From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964928AbbCRN6Y (ORCPT ); Wed, 18 Mar 2015 09:58:24 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:48622 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933552AbbCRN42 (ORCPT ); Wed, 18 Mar 2015 09:56:28 -0400 From: Roger Quadros To: , , CC: , , , , , , , Roger Quadros Subject: [RFC][PATCH 4/9] usb: otg: hub: Notify OTG fsm when A device sets b_hnp_enable Date: Wed, 18 Mar 2015 15:55:58 +0200 Message-ID: <1426686963-11613-5-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1426686963-11613-1-git-send-email-rogerq@ti.com> References: <1426686963-11613-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is the a_set_b_hnp_enable flag in the OTG state machine diagram and must be set when the A-Host has successfully set the b_hnp_enable feature of the OTG-B-Peripheral attached to it. When this bit changes we kick our OTG FSM to make note of the change and act accordingly. Signed-off-by: Roger Quadros --- drivers/usb/core/hub.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index d7c3d5a..ab0d498 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -2270,6 +2271,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev) "can't set HNP mode: %d\n", err); bus->b_hnp_enable = 0; + } else { + /* notify OTG fsm about a_set_b_hnp_enable */ + usb_otg_kick_fsm(udev->bus->controller); } } } @@ -4244,8 +4248,13 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, */ if (!hdev->parent) { delay = HUB_ROOT_RESET_TIME; - if (port1 == hdev->bus->otg_port) + if (port1 == hdev->bus->otg_port) { hdev->bus->b_hnp_enable = 0; +#ifdef CONFIG_USB_OTG + /* notify OTG fsm about a_set_b_hnp_enable change */ + usb_otg_kick_fsm(hdev->bus->controller); +#endif + } } /* Some low speed devices have problems with the quick delay, so */ -- 2.1.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Quadros Subject: [RFC][PATCH 4/9] usb: otg: hub: Notify OTG fsm when A device sets b_hnp_enable Date: Wed, 18 Mar 2015 15:55:58 +0200 Message-ID: <1426686963-11613-5-git-send-email-rogerq@ti.com> References: <1426686963-11613-1-git-send-email-rogerq@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1426686963-11613-1-git-send-email-rogerq@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: gregkh@linuxfoundation.org, balbi@ti.com, stern@rowland.harvard.edu Cc: dan.j.williams@intel.com, peter.chen@freescale.com, jun.li@freescale.com, mathias.nyman@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Roger Quadros List-Id: linux-omap@vger.kernel.org This is the a_set_b_hnp_enable flag in the OTG state machine diagram and must be set when the A-Host has successfully set the b_hnp_enable feature of the OTG-B-Peripheral attached to it. When this bit changes we kick our OTG FSM to make note of the change and act accordingly. Signed-off-by: Roger Quadros --- drivers/usb/core/hub.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index d7c3d5a..ab0d498 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -2270,6 +2271,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev) "can't set HNP mode: %d\n", err); bus->b_hnp_enable = 0; + } else { + /* notify OTG fsm about a_set_b_hnp_enable */ + usb_otg_kick_fsm(udev->bus->controller); } } } @@ -4244,8 +4248,13 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, */ if (!hdev->parent) { delay = HUB_ROOT_RESET_TIME; - if (port1 == hdev->bus->otg_port) + if (port1 == hdev->bus->otg_port) { hdev->bus->b_hnp_enable = 0; +#ifdef CONFIG_USB_OTG + /* notify OTG fsm about a_set_b_hnp_enable change */ + usb_otg_kick_fsm(hdev->bus->controller); +#endif + } } /* Some low speed devices have problems with the quick delay, so */ -- 2.1.0